AnyFish for fish nav vs NavMesh?

Has anyone used AnyFish before for navigating slithering/fish-like creatures? http://swordtail.tamu.edu/anyfishWiki/index.php5/AnyFish_Unity_Quickstart_Guide#Introduction

How does this compare to NavMesh?

Looks to be completely different from NavMesh and entirely focused on simulating fish behavior. Never seen this project before, is it open source? If so is the source freely available somewhere? Wouldn’t mind sneaking a peak (I studied ichthyology years back).